The very minimal Casanet UI based vanilla HTML + CSS + JS without any other library/framework, wight in total below ~20KB!!!
Used for very slow networks and devices.
The lightweight dashboard served URL is [CDN / local address]/light-app/index.html.
The source code is ready to use (no need any build process), to set custom API_URL, run node scripts/set-environment.js with API_URL env var.